Lawn-mower.



2 SHEETS-SHEET l.

Patented Sept. 24, 1912.

2. m E 1 L 7| Bln URE Il. AEF WD .0E LMH ,.N -NF www A .Ln H m u J P P A J. H. & J. L. AUBLB.

LAWN MOWBR.

APPLICATION FILED Imm, 1912.

1,039,475, Patented Sept. 24, 1912.

2 BHBBTS-SHEET 2.

' after UNTTED STATES PATENT oEEioE.

JAMES H. AUBLE AND JAMES L. AUBLE, OF CINCINNATI, OHIO, ASSIGNORS OF ONE- THIRD T0 H. A. BARRETT, OF CINCINNATI, OHIO.

LAWN-MOWER.

' Specification of Letters Patent.

Patented sept. 24,1912.

Application `1ed February 7, 1912. Serial No. 675,970.

To allwtom it may concern:

Be it known that we, JAMES H. AUBLE and J AMES L. AUBLE, citizens of the United States, and residents of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lawn-Mowers, of which the following is al full, clear, and exact description, kreference being had to the accompanying drawings, forming part of this specification.

Our invention relates to improvements in the construction and operation of cutting knives for clipping, cutting and mowing machines generally, and more particularly in the embodiment thereof as hereindescribed, ada ted for use in mowing machines and especlally lawn mowers.

The object of our invention is to provide a construction of rotary cutting knives cylindrically and spirally arranged to cooperate with each other by rotation in opposite directions, whereby the rapidity of the cutting operation may be very materially increased, the transverse diameter of the spiral can be decreased to gain power and the material to be out can be acted upon by the knives at all points of rotation.

In the drawings, Figure 1 is a front elevation of our improved Construction as applied to a lawn mower. Fig. 2 is a. vertical transverse section through one of the driving gears, taken on the line 2, 2 of Fig. 1. Fig. 3'is a vertical longitudinal section, taken on the line 3, 3, of-Fig. 2, broken away at the middle portion, with the two ends separated. Fig. 4 is a side elevation of thc opposite driving wheel, partly broken away.

. Fig. 5 is a plan view of o ne set of the spirally arranged cutting knives. Fig. 6 is a similar View of the other set. Fig. 7 is a arms are pivoted each to its respective disk on a stud 7, and the angle of the handle is adjusted for different elevations by.means of a set screw 8, which takes through a radial slot 9 in each arm, the set screw being arranged to clamp the handle in any desired positlon within the limits of thc adjustment. The rod or bar 3 connecting the two disks 1 and 2 is located some distance to the rear of the axis of the two disks, so as not to impede or block the cutting space of the implement. Mounted on each of these disks 1 and 2, to rotate freely thereon, are the carrying and driving wheels 10,11, of the machine, the carrying wheels being held in rotatable position lby a bolt or screw 12, taking into its respective disk, Each of the carrying wheels is hollowed, out and rovided with an internal gear 13. on the inner surface of the peripheral iange of the wheel, and this peripheral gear is engaged by its pinion 14 on one side, and 15 for the opposite gear. The pinion 15 is mounted on a stud 16 which has its bearing in the disk 2, and this stud carries on the inside the spirally arranged cutter, shown separately in Fig. 6. This cutter comprises the end disks 17, 18, with the cylindrically and spirally arranged cutting knives 19, 20 and 21, extending from disk to disk, and for the pitch of the spiral we prefer to give each of these spiral plates a half turn between its ends, although it will bewunderstood that the pitch of the spiral may be varied for different requirements. The cutter as a whole is slightly conical, or formed in the shape of a truncated cone, with the driven end 17 of larger diameter. For the opposite carrying wheel and driving gear, the pinion 14 is mounted on a stud 22 on the disk 1, and this pinion engages a second pinion Q3, mounted on a stud 24, having its bearing in the disk 1, and carrying tion between the two sets of spiral knives l in opposite directions.

may be taken up and the spirals may be adjusted with reference to each other for wear. A lock nut 33 is provided to hold thetwo sets of Vspiral knives in their adjusted position.

The pitch of the spiral knives 27 and 28 is preferably about half the pitch of the inner set of spiral knives, and each of .the knives 27, 28, is preferably given a complete turn between its ends. In any event, the two sets of spirals areso' arranged with reference to each other that they may give the proper shearing cut as the yedges pass each other. Inasmuch as the inner set of spiral knives is driven directly by the pinion in engagement with the peripheral gear on its driving wheel, this set of spirals will rotate in the same. direction that the carrying wheel is moving. For the other driving wheel with which the pinion 14 engages, and which pinion in turn engages the pinion 23, this outer set of spiral knives Will be driven in the' opposite direction, so as the implement is pushed over the ground, the two sets of spirals will rotate rapidly dent that the two driving wheels andthe sets of spiralv knives driven thereby will rotate independently ofeach other, so that in turning corners one wheel can rotate more rapidly than the other.

The effect of the rotation of the two sets of spiralcutting knives coperating with each other and moving in opposite directionsA is to furnish a plurality of cutters operating at all points 'of the circumference 'of the spirals, and the` fact that the in opposite directions very largely increases the rapidity of the cutting operation.l

Where a single rotating spirally arranged set of knives are em loyed coperating with a xed bar, the splrals must necessarily be made large to obtain a proper stroke and the pitch of the spiral must necessarily be very great, in order to give the proper shearing cut. With our construction, however, inasmuch as the cutting edges are both spirally arranged, a much more pronounced spiral may be given the knives, and the cutting surfaces are in much freer position to attack the material to be cut. The lines of cut with our construction are also substantially at right'angles to the advance of the implement, these lines of cut being shown by the line 34 in Fig. 7, in which view two of the knives are shown, and the spiral cut-ters, yment is advanced, follow each other with It will also be evi.

mounted inside the 4of the cutting edges at the point of cut.

Inasmuch as a plurality of spirally disposed knives are employed for each of the the lines of eut as the implegreat rapidity, so that the grass is cut, or the material clipped very evenly. As the spirals are open, and Wherever any two of the oppositely moving plates are passing each other, a cutting position is presented so that any height of grass can be cut with our implement, and there is no danger of clogging. The cutting knives, moreover, can bey advanced in their location with reference to the Icarrying wheels, so that the cutters can extend slightly beyond "the periphery of these carrying wheels, 2 and 4, and as the two sets of knives move past each other in opposite directions the cylindrical diameter of the cuttersmay be made much smaller and still obtain the necessary shearing cut than can be obtained where a single spiral cutter with spirally disposed knives is provided to coperate with a straight cutting blade. diameter of the'cylindrical cutters, we can thus gain power, and our construction is therefore much more effectual with high grass.

Having thus described` `our invention,

as illustrated in Figs.v

By decreasing the what we claim as new and rdesire to secure l by Letters Patent, is

1. In a machine of the character specified, a pair of spiral cutters of different pitch arranged to coperate with each other to make a shearing cut with the one cutter opposing cutter, and

means for rotating said cutters in opposite directions.

2. In a machine of the character specified, a pair of spiral cutters of different pitch, each spiral cutter provided with a plurality of spirally arranged cutting knives, the knives of each cutter arranged to coperate with the knives of theopposing cutter vwith the one cutter mounted inside the opposing cutter, and means for rotating said cutters in opposite directions.

3. In a machine of the character specified, a pair of spiral cutters of different pitch, each cutter provided with a plurality of spirally arranged knives, the knives of each cutter being of the same pitch, with one cutter mounted inside the opposing cutter, and 'means for rotating said cutters in opposite directions. 4. In a machine of the characterl specified, a pair of spiral cutters of different pitch, 'each cutter provided with a plurality of spirally arranged knives, the knives of each cutter being of. the same pitch, with one cutter mounted inside the opposing cutter, and the two cutters in the shape of truncated cones, with means foradjusting the the one cutter mounted inside the opposing cutter,l and means to rotate said cutters in opposite directions with the advance of the implement.

6. In a mower, the combination with a 'framework and carrying wheels mounted to rot-ate thereon, and a pair of spiral cutters of different pitch, arranged to coperate .with each -other to make a shearing cut,

mounted on said frame with the one cutter mounted inside the opposing cutter, and connecting mechanism intermediate each cutter and its respective carrying wheel for rotating the cutters in' opposite directions with the rotation of the carrying wheels.

7. In a mower, the combination with a framework and carrying wheels mounted to rotate thereon, and a pair of spiral cutters of diiferent pitch, arranged to coperate with each other to make a shearing cut, mounted on said frame with the one cutter mounted inside the opposing cutter, with gearing intermediate each cutter and its respective carrying wheel and an additional gear for one of said cutters whereby the cutters will be rotated in opposite directions with the rotation of the carrying Wheels.

8. In a mower, the combination with a framework and'carryin wheels mounted to rotate'thereon, of a palr of spiral cutters of different pitch, each spiral cutter provided with a plurality'of spirally arranged cutting knives, the knives of each cutter arranged to coperate with the knives of the opposing cutter, each cutter mounted in the frame with the one cutter mounted inside the opposing cutter, and means to rotate said cutters in opposite directions with the advance of the implement.

9. In a mower, the combination with a framework and carrying wheels mounted to rotate thereon, of a palr of spiral cutters of different pitch, each spiral cutter provided with a plurality of-spirally arranged cutting knives, the knives of each cutter arranged to coperate with the knives of the opposing cutter, each cutter mounted in the frame with the one cutter mounted inside the opposing cutter, and connecting mechanism intermediate each cutter and -its respective carrying wheel for rotating the cutters in opposite directions with the rotation of the carrying wheels.

10. In a mower, the `combination with a I framework and carrying wheels mounted to rotate thereon, of a air of spiral cutters of different pitch, eac splral cutter provided with a plurality of spirally' arranged cutting knives, the knives of each cutter arranged to coperate with the knives of the opposing cutter, each cutter mounted in the frame with the one cutter mounted inside the opposing cutter, with gearing intermediate each cutter and its respective carrying wheel, and an additional gear for one of said cutters whereby the cutters will be rotated in opposite directions with the rotation of the carrying Wheels.

11. In a mower, the combination with a framework and carrying wheels mounted to rotatethereon, of a pair of spiral cutters of different pitch, each cutter provided with a plurality of spirally arranged knives, the knives of each cutter being of the same pitch, with one cutter mounted inside the opposing cutter and means to rotate said cutters 1n opposite directions with the advance of the implement.

12. In a mower, the combination with a framework and carrying wheels mounted to rotate thereon, of a pair of spiral cutters of different pitch, each cutter provided with a plurality of spirally arranged knives,

the knives of each cutter being of the same pitch, with one cutter mounted inside the opposing cutter, and connecting mechanism intermediate each cutter 4and its respective carrying wheel for rotating the cutters inv opposite directions with the rotation of the carrying wheels.

13. In a lawn mower, the combination with a framework and carrying wheels mounted to rotate thereon, of a pair of spiral cutters of different pitch, each cutter provided with a plurality of spirally arranged knives, the knives of each cutter being of the same pitch,l with one cutter mounted inside the opposing cutter, with gearing intermediate each cutter and its respective carrying wheel, and an additional gear for one of said cutters whereby the cutters will be rotated in opposite directions `with the rotation of the carrying wheels.

14. In a mower, the combination with a framework and carrying wheels mounted to rotate thereon, of a palr of spiral cutters of different pitch, each cutter provided with a plurality of spirally arranged knives, the knives of each cutter being of the same pitch, with one cutter mounted inside the opposing cutter, and the two cutters in the shape of truncated cones, with means for adjusting the cones longitudinally, and connecting mechanism intermediate each cutter and its respective carrying wheel for rotating the cutters in opposite directions with the rotation of the carrying wheels.

15. In a mower, the combination with a framework and carrying wheels mounted to rotate thereon, of a pair of spiral cutters vknives of each cutter being of the same pitch, with one cutter mounted inside the opposing cutter, and the tWo cutters in .the shape of truncated cones, With means for adjusting the cones longitudinally, with gearing intermediate each cutter and its respective carrying Wheel and an additional gear for one of said cutters whereby the JAMES H. AUBLE. JAMES L. AUBLE.

Witnesses: EARL W. GRIFFIN,

ANNAF. DIENST. 

